I have the same issue. I filed by taxes as Married by a financial service company and I am filing as Single this year on Turbo Tax (I divorced last year). I am asked for Form 6251, line 4 Alternative minimum taxable income, I don't have a 6251 from 2021. And should I follow what Turbo Tax advised below to get the AMTI??
"Form 1040 or Form 1040-SR, Line 15, plus your standard deduction (Form 1040 or Form 1040-SR, line 12a) from 2021"?
